Key-duplicating machine



July 17, 1923. 1.462.150

s. SEGAL I KEY DUPLICAT ING MACHINE Filed March 1'7, 1920 V 1 a5 7 I Patented July 17, 1 923.

PTET OFFICE.-

SAMUEL SEGAL, OF NEW YORK, N. Y.

KEY-DUPLiCATING MACHINE.

Application filed March 17, 1920. Serial No. 366,502.

To all whom it may concern:

Be it known that LSA UEL SEGAL, a citizen of the United States,' and a resident of New York, in the county of New Yorkand State of New York, have invented certain new and useful Improvements in Key- Duplicating Machines, of which the following is a specification.

lVly invention relates to key-duplicating machines by means of which a keysimilar to any given master key may be easily and accurately produced. or made, the invention relating more particularly to theform and construction of the work-holding clamps for holding the master key'and key blank during the duplicating operation as well as to a novel attachment for said machine by means of which the key and key blank may be given. the same relative longitudinalpo'sition' in their respective clamps.

The object of my invention is the production of a novel work-holding clamp adapted for use on key-duplicating machines which shall be simple inconstruction'and of few parts and by means of which the master key and key blank may beexpeditiously placed and firmly. properly and accurately held in the desired and same relative vertical position.

A further object of the. invention is the production of a novel form of work-holding 'clampifo'r key-duplicating machines which shall be adapted to properly position and firmly hold in the desiredposition either a key of the cylinder lock type or a flat key. A further objectof the invention is the production ofa novel attachment for keyduplicating machines whereby the key and key blank may be placed and clamped in their respective clamps in thesame relative longitudinal position. i

To these ends my invention 'consistsin the novel parts and combinations" of the same hereinafter more particularly de scribed and then specified in the claims.

. In the accompanying "drawing: I Fig. 1 is a front elevation of my keyduplicating machine.

Fig. 2 is a vertical cross-section on the line 2-2 of F igl .1. p I

Fig. 3 is a plan view of one of my improved work-holding-clamps. I 3

F ig'. 4 is a horizontal section on the line di'of 3.

5 and 6 are sectional views of a portion of one of the clamps showing .in Fig. 5 a cylinder lock key and in Fig. .6 a flat key held thereby.

Fig. 7 is a perspective view of the sliding plates of the clamp. I

Referring in detail to the. several figures of the drawing:

10 indicates the side plates of-a keyduplicating. machine which are connected to the body members 11 thereof and 12 indicates a rod rigidly held to said side plates 10. 13 indicates the carriage of the machine which is horizontally slidably mounted on the rod 12. Said carriage is provided with and. which will presently be ClQSCIllIQCllH' detail. 1

17 indicates a guiding finger which is suitably and preferably rigidly mounted in a post 18 extending upwardly from the machine. M finger is adapted to engage'the notches in the biting edge of a key held in the clamp 15. 19 indicates a standardextending upwardly from the machine in which a shaft is journalled and held in position by a nut 20 on one end thereof and by a driving wheel. 21 on the other end. Said driving wheel is provided with a handle 22 for rotating 'the same and with a groove 28 adapted to receive a belt (not shown) whereby the driving wheelmay bepower drivenifso'desired. A rotary cutting too] '24 is also mounted on the saidsliaft and is adapted to engage the biting edge ofa key 7 blank held in the clamp 15 and to cut notches in the biting edge of said key" blank when said drivingwheel 21 is rotated.

25 is a positioning attachment having extensions 26 pivoted to the post 18 and also liavjing outwardly extending arms/27' each the key and key blank with the horizontal flanges 28 of the attachment. lVhen not in use and during the duplicating operation the attachment may be swung upwardly on its pivot, as shown in dotted linesin Fig. 2, into engagement with a suitable stop29.

The outer edge of saidguiding My improved work holding clamps 15 and zontal movement of the same.

15 for giving the proper vertical or transverse position to and firmly holding the master key and key blank therein are identical in size and construction so that a description of one will snfiice for both. They each comprise a one-piece ring having an enlarged head, as shown, with a slot 30 cut therethrough having flat opposed surfaces, said slot forming the front jaw 3t and the rear jaw 32 of the clamp. Said rear jaw 32 is provided with a reduced or cut-out portion 33 and both jaws are provided with longitudinal grooves 34; as shown. 35 indicates a lower plate engaging the reduced portion 33 of the rear jaw 32 and slidable longitudinally thereon and within the grooves 34. 36 indicates an upper plate superimposed on said lower plate and slidable thereon and within the grooves 3st.

Said upper plate is provided with a reduced end 37 adapted to engage the usual groove in the side of a key of the cylinder lock type as clearly shown in Fig. 5. Said plates and 36 are provided with shoulders 38 and. 39 respectively providing means for gripping-the same whereby the plates may he moved in the desired position. Said plates 35 and 36 are also provided. with slots 40 and 41 respectively receiving a screwthreaded pin 42 screwed in the rear jaw 3 of the clamp and which obviously limits the forward or rear movement of said plates. The said plates may be held in the desired position by tightening said screw-threaded pin 42 to effect a clamping of a suitable washer 43 against the upper plate 36.

44 indicates screw-tln'eaded bolts extending through the jaws 31 and 32 of the clamps 15, 15 and which may be operated by winged nuts 45 to draw said jaws together in order to clamp or hold a key therebetween when the nuts are turned in one direction or to permit the jaws to spread apart due to the spring action in the metal of the clamps when the nuts are turned in the other direction and thereby effecting an unclamping of the key. i

To properly position and clamp a key of the cylinder lock type in the clamp, the pe sition of the lower plate 35 is ordinarily immaterial, it being shown in forward position in Fig. 4E and in rear position in Fig. The upper plate 86 is moved forwardly after the key has been slipped between the jaws of the clamp with the biting edge thereof extending upwardly and the reduced end 37 of the upper plate is brought into engagement with the conventional groove in the side of the key and the upper plate is clamped in this position by tightening the screwthreaded pin 4-2. This prevents the key from being withdrawn from the clamp by a vertical. movement but permits a hori- Its proper longitudinal position is then obtained by The wheel 21' is operated to rotate the cutting tool 2 and the carriage is swung up manually on the rod 12, as shown in dotted lines in Fig. 2, to cause either end of the biting edge of the master key to be pressed against the guiding finger 17. The carriage is moved slowly and horizontallyalong the rod 12, contact at all times being preferably kept between the biting, edge of the master key and the guiding finger 17. The forward movementof the carriage towards the;

guidingfinger is limited by the depth of each notch or cut in the biting edge of the master key and a notch or cut of equal depth will be made in the edge of the key blank by the cutting tool 24G in an obvious manner.-

In the case of flat keys which are not provided with grooves in the sides thereof as are cylinder lock keys, the lower plate 35 is moved forwardly tospan the slot 30 between the jaws of theclamp and the upperplate 36 ismoved rearwardly as shown in Fig. 6 and the plates held in this position by tightening the screw-threaded pin 4L2 as in the previous case. The key is then seated on the lower plate 35 between the jaws of the clamp and its proper longitudinal position obtained by meansv of the attachment 25, after which the key is tightly held between the jaws by operating the winged nut 45. The key blank being also. positioned and held in its respective clamp in the same relative position as the master key and in the same manner, the duplicating operation may be proceeded with.

For properly positioning the key and key,

blank in their respective clamps it is neces sary to fix their longitudinal and transverse positions therein in the manner previously described. Inthe particular machine shown in the drawings and above.described,'this longitudinal and transverse position is. obtained by adjusting the position of the key and key blank horizontally and vertically but it will be understood that this is merely due to. the particular organization of the preferred form of machine.

hat I claim as my invention is:-

1. In a key-duplicating machine, a pair of clamps for holding a master key and key blank, a post extending upwardly from the machine and having a guiding finger mounted thereon and an attachment pivoted to said post'and provided with outwardly ex-.

tending arms adapted to simultaneously engage the shoulders on the key and key blank adjacent their biting edges whereby said key and key blank may be given the same relative longitudinal position in their respective clamps.

2. In a key-duplicating machine, a clamp having opposed jaws adapted to grip a key therebetween, a plate carriedby said clamp and" movable independently thereof and adapted to span the slot betweensaid jaws and to support a key thereon and a second platecarried by said clamp and adapted to enga e a groove in the side of the key.

8. In a key-duplicating machine, a clamp having opposed jaws adapted to grip a key therebetween, a plate carried by said clamp and adapted to span the slot betweensaid jaws and to support a key! thereon and a second plate provided with means for engaging a groove in the side-of the key, one

of said plates being superimposed on the other of said plates.

4:. In a key-duplicating machine, a clamp having opposed jaws adapted to grip a key therebetween, a slidable plate carried by said lamp adapted to span the slot between said jaws and to support a key thereon and a second slidable plate provided with a reduced end for engaging a groove in the side of the key, oneof said plates being superimposed on the other of said plates.

5. In a key-duplicating machine, a clamp having a slotted head forming opposed jaws adapted to grip a key therebetween, said I head being provided with a groove therein,

means for drawing said jaws together, a plate carried by said clamp extending in the grooveand adapted to span the slot between the jaws and to support a hey thereon and a second plate extending in the groove and provided with means for engaging a groove in the side of the key.

6. In a key-duplicating machine, a clamp. having opposed jaws adapted to grip a key therebetween, a plate carried by said clamp and movable independently thereof and adapted to support a key thereon and a second plate carried by said clamp provided with means for engaging a groove in the side of the key. p

7. In a key-duplicatingmachine, a clamp having opposed jaws adapted to grip a key! 'therebetween, a slidable plate on said clamp adapted to support a key thereon anda second slidable plate superimposed on said first plate provided with a reduced end for engaging a groove in the side of the'key.

8.1 In a key-duplicating machine, a clamp havinga slotted head forming opposed jaws adapted to grip a key, said head being provided with a groove therein, means for drawing said jaws together, a Islidable plate extending in said groove and adapted to support a ke thereon and to span the slot between sai jaws and asecond slidable plate superimposed on said first plate and extending in said groove and provided with a reduced end adaptedto engage a groove in the side of'the key. i

9. In a key-duplioatingmachine, a clamp having opposed jaws adaptedto grip a key therebetween, a plate carried by and independent of said clamp and'adapted to support a key thereon and means independent of said plate and carried by said clamp for engaging a groove in the'side ofithe key.

10. In a key-duplicating machine, a clamp having opposed jaws adapted to grip a key 'therebetween, means carried by said clamp and independent thereof and adapted to support a key thereon and a plate independent of said supporting means and carried by said clamp for engaging a groove in the side of the key.

11. In a key-duplicating machine, a clamp I having opposed jaws adapted to grip a key therebetween, a plate carried-by said clamp adapted to support a key thereon,a second plate, carried by said clamp adapted to en.- gage a groovein the side of the key and means engaging said clamp for holding said I plates in the desired position.

12; In a key-duplicating machine, a clamp having opposed jaws adapted to grip a key therebetween, a plate carried by said clamp adapted to support a key thereon and provided with a slot therein, a second plate Signed at New York, in the county of] New York and State of New York, this 16th day of March, A. D. 1920. J

SAMUEL sEeAL.

Witnesses F. B. TOWNSEND, IRENE LnrKowrrz. 

